Dust cap for tire valves



July 15, 1924.

E. v. MYERS DUSTCAP FOR TIRE VALVES Filed Nov. 24 1919 Egg; z,

INVENTOR- Kg/451m 7771 M- I By Attorneys,

Patented July 15, 1924.

EUGENE V. MYERS, OF EAST ORANGE, NEW JERSEY, ASSIG-NOR TO A. SOHRADERS SON, INCORPORATED, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

DUST CAP FOR TIRE VALVES.

T all whom it may concern:

Be it known that I, EUGENE V. M ERS, a citizen of the United Statesof America, residing in East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Dust Caps for Tire Valves, of which the following is a specification.

This invention relates to dust caps for tire valves, and aims to provide certain improvements therein.

The invention is particularly directed to quick detachable dust caps adapted to be applied to the projecting ends of tire valves, although it is susceptible of uses in other connections. 7

The present invention is of that type of dust cap shown in my applications filed December 20, 1918, Nos. 267,701 and 267,702, that is to say, of the type in which a metallic clamping member is provided, preferably in the form of spring arms which are adapted to be compressed by a turning movement of the cap portion. In the construction of such applications the spring arms are shown as formed upon or carried by the cap portion, there being a foot portion provided with a tapering surface designed to press the spring arms inwardly upon a relative rotary movement of the cap and foot portions, which causes a relative axial displacement of such portions, thereby forcing the spring arms against such tapered surface.

According to the present invention in its preferred form, the spring arms are formed upon an internal sleeve which is threaded to the cap portion, and which is provided with means for preventing its rotation with relation to the valve casing. By this means 7 the cap portion may be so constructed as to substantially conceal the working parts thereof, and a cheaper construction of cap may be obtained. The invention also include certain other features of improvement which will be hereinafter more fully described.

Referring to the drawings, which illustrate several embodiments of the invention,

Figure 1 is a view partly in diametrical section of the cap complete.

' Fig. 2 is a Vie showing a sim lar section.

Application filed November 24, 1919. Serial No. 340,389.

of the lower part of the cap when the cap is mounted on a valve.

Fig. 3 is a cross-section on the line 3-3 in Fig. 1.

Fig. 4 is an under-side view.

Fig. 5 i a view of a modified construction, the lower part being shown in section.

Fig. 6 is a cross-section on the line 66 in Fig. 5. 1

Referring first to Figs. 1 to 4, let A indicate the cap as a whole which comprises a shell A, formed in any suitable manner and B an internal sleeve, the upper part of which is screw-threaded to engage internal threads formed on the cap. The internal sleeve may be variously constructed, but is provided with means for preventing its rotation relatively to the valve casing, so that when the cap is rotated, the sleeve will remain axially stationary. Such means may be theflats C, shown in the drawing, or any other suitable means. It will be seen that when the sleeve engages the flats and the cap is turned, that the sleeve will travel either upwardly or downwardly with relation to the cap, depending upon the direction in which the cap i rotated, and the thread which connects the two parts. With a right handed thread, the sleeve will travel upwardly when the cap is rotated to the right, and with a left-handed thread it will travel downwardly under similar conditions.

This movement of the sleeve is utilized to operate a clamping device. In the preferred construction shown the clamping device comprises spring arms carried by the sleeve, which spring arms are indicated by the letter D, and may be as numerous as is desired. Preferably they are formed by cutting tongues from the body of the sleeve in such manner as to leave a cylindrical imperforate portion E at the bottom. In the construction shown in Figs. 5 and 6 wherein a right-hand thread is employed, the cap is preferably formed with a tapered portion F adapted to engage the spring arms and move them inwardly when the sleeve rises within the cap, or the cap is lowered with relation to the sleeve. In the construction shown in Figs. 1 to 4, wherein a left-hand thread is employed and the turned to the right, the tapered portion is displaced from above the spring arms to a point belowthe latter, as is shown at H. The construction of Figs. 5 and 6 is preferred, since after the spring arms or equivalent clamping means have engaged the thread a further screwing movement moves the cap portion downwardly, so that it tightens against the rim nut or wheel felloe. Other clamping means may be used, if desired. In the construction shown the ends of the spring arms are turned inwardly to engage the threaded parts of the valve casing, so as to positively clamp the cap on the valve casing. Such spring arms may, however, be otherwise formed, if desired. i

It is obvious that the invention may be applied to other devices than dust caps, if desired.

While I have shown and described one form of the invention, it will be understood that various changes may be made therein without departing from the spirit of the invention.

What I claim is: V v

1. In a dust cap or the like, the combination of a cap portion, an 'internalsleeve, and a non-compressible clamping means operated by a relative movement of said internal sleeve and said cap portion, the clamping means being carried by the internal sleeve.

2, In a dust cap or the like, the combination of a cap portion and an internal sleeve threaded to the cap portion, and having spring arms, and means for positively compressing said spring arms upon relative axial movement between said cap portion and sleeve.

3. In a dust cap or the like, the combination of a cap portion, and an internal sleeve having spring arms, said cap portion having a tapered part adapted to engage said spring arms and said internal sleeve being threaded to said cap portion, wherebyvupon a relative rotary movement of said parts said spring arms and tapered part are brought into contact to compress said arms.

4. In a dust cap or the like, the combination of a cap portion and an internal sleeve threaded to said cap portion and having spring means intermediate its ends and means for positively moving said spring means radially inward upon relative axial movement between said cap portion and sleeve.

In witness whereof, I have hereunto signed my name.

EUGENE V. MYERS. 

